How did the formation of NATO and later the Warsaw Pact escalate the Cold War?

Communist expansion prompted the United States and 11 other Western nations to form the North Atlantic Treaty Organization (NATO). The Soviet Union and its affiliated Communist nations in Eastern Europe founded a rival alliance, the Warsaw Pact

Explanation:

yes they have. but is this a true false question? if it is, the answer is true.

because the vietnam war was fought in an especially brutal and untraditional way